NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE I9I 



Table 10. — Synopsis of the invertebrates of Point Barrow, Alaska — continued 



^ y o.a o-n o u o^ o^ 00 



2" S" feES" ^M ^^ 5rt S 



Invertebrates H° ^< ^< ^< ^< ^< ^^ ^ ■ 



*Cumaceans 9 4 2 3 



*Tanaidaceans i 



*Isopods II 2 I I I 



Amphipods 100 3 43 12 3 6 13 8 



Euphausiids 3 i i o 



Decapods 21 i 2 i 4 



*Arthropods — Pycnogonids . . 10 I I 

 Mollusks 



*Pelecypods 38 2 2 2 i i 16 I 



*Gastropods 89 12 4 3 10 2 23 4-10 



Amphineurans 2 20 



*Cephalopods 3 i 



*Enteropneusts i 



*Tunicates 30 i 19 ? 



Totals 721 44 80 77 92 21 117 53-59+ 



* Indicates that not all the species have been identified. 



Even though the data on the ranges are still incomplete, the ranges 

 of 339 animals have been materially extended and new locality records 

 have been established for an additional 90 species. In addition there 

 is a minimum of 52 new species. The large number of animals with 

 extended ranges is not surprising in view of the fact that the total 

 number of invertebrates collected is approximately 722, whereas the 

 International Polar Expedition to Point Barrow collected only i88, 

 including a few fresh-water species. 



The distribution of the species according to oceans is set forth for a 

 few groups in the table below : 



Totals .. 428 208 48.6 83 19.3 96 22.4 41 9.6 



• Includes two species common to the Arctic and the Antarctic. 



